diff options
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/PowerPC/README.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index abd9157..972e5bb 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -217,5 +217,22 @@ _test: stw r2, 0(r3) blr +===-------------------------------------------------------------------------=== + +Compile +int foo(int a) { return a * -2 + 63; } + +to + +_foo: + slwi r0,r3,1 + subfic r3,r0,63 + blr + +instead of: +_foo: + mulli r2,r3,-2 + addi r3,r2,63 + blr |